Last name Fieux (Fieux 
) , throughout the world, is a rare family name. The family name Fieux is habitual in France, where it is a rare surname, Belgium, and Nicaragua, where it is a very rare surname. Measured by absolute frequency, it is commonest in France, Belgium, and the United States. Very seldom, Fieux is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fieux | China, Belgium, United States, India, France |
| pascal fieux French magistrate, FR (b. 1875) |
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| jean fieux FR (b. 1886) |
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| michèle marie fieux French oceanographer (b. 1940) |
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| michèle fieux (b. 1940) |
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| maxime fieux researcher |
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Mr, Laura, Loïc, Jelle, Julie, Jules, Nancy, Henri, Felix, Odile, Yentl, Maxime, Michel, Sherry, Sophie, Arthur, Adrien, Agnès, Claude, Pascal, Pierre, Romain, Gerda, David, Robbe, Kelly, Sã, Cã, Mary, Alix, Andy, Bert, Paul, Grã, Lien, Loic, Riquet, Léa, Jean, Eric, Yann, Marie, Mieke, Scott, Annie, Chloe, Bruno, Karen, Joel, and Demoss